Convection is the flow of heat energy from a region of high temperature to a region of low temperature by movement of a fluid. Convection only occurs in fluids (liquids and gases). Convection in a ...

A beaker is heated and the coloured fluid inside shows convection currents This is because the particles in liquids and gases move faster when they are heated than they do when they are cold.

It's based on a simple heating principle found in natural systems and has been used in ovens for decades: convection heat. Hugo Ulloa, a fluid dynamics scientist at the University of Pennsylvania ...